Attachment for lathe machines



March 28, 1950 R. o. PEARCE ETAL I 2,502,274

\ ATTACHMENT FOR LATHE MACHINES Filed June 12, 1947 3 Sheets-Sheet 1 l 36 34 3 "wit W 1 firm:

36 38 1;) H 36 H 5 L Min IT 4 vvv LJ Inventors Robert 0. Pearce Roberf W. Kramer March 28, 1950 R. o. PEARCE ETAL 2,502,274

ATTACHMENT FOR LATHE MACHINES Filed June 12, 1947 s Sheets-Sheet 2 Fig 3. 78 56 54 6284 I I8 22 A FI-IIIIH Ill-ll Fig. 4 60 /64 5 8 56 W 3 -9- //226 38 0 42 44 fie 48 40 m \l u 30 Inventors Roberf 0. Pearce Robert W Kramer 13) WW 15. m

March 28, 1950 ATTACHMENT FOR LATHE MACHINES Filed June 12, 1947 3 Sheets-Sheet 3 Fig. 5.

I nz'entbrs Robert 0. Pearce Robert W Kramer B I! f W a a ittarnqys- R. o. PEARCE ETAL 2,502,274

Patented Mar. 28, .1950

ATTACHMENT FOR LATHE MACHINES RlibeIt O'. Pearce, Elgim andiRobert'W.rKramer; :Garpentersville; 1111.

Application] uneflZ', 1947.,iSeria1 No. 254224 This 'rinven'ti'on relates to *new and "useful provements inattachments forlathe machines andthe primary object of the present invention is to provide a carrier supportinga tool that engages a piece of. 'work for machining the "same and said carrierincludes-means wherebyt'he tool is "retracted from engagement with the master screw or work'as theearriercontadts a carrier stop mounted onthe lathe.

Another important "object of thepresent inven-' tion Fistfthe provision of 'an attachment pivotally mounted on a lathe bed and supporting tools-at each end-"thereof for selective movement into engagement with a piece'of workthat is rotated by'saidlathemachine; V

A Eur'therobject of thepresent invention is to provide a tool carrier including novel and improved. means for advancing and retracting said carrier relativeto a piece of work.

A still 'further aim ofthe present invention is to provide-a lathe attachment that is simple andpractic'al in construction, efficient and reliable in use, relatively inexpensivetomanufacture, and otherwise well adapted *for the purposes for whi'chthe'sa-me ls' intended;

"Other object's"andadvantages reside in the-details" of construction "and operation as more 'fiilly hereinafter described and "claimed, reference beinghadto the -accom'pa'n-ying' "drawing-s forming part :thereof wherein like numerals refer 'tolike parts throughout, andin whieh Figurel is "aside -'elevational view-'of' the present inventiomiwith parts'broken-a'wayand shown in -section:

Figure2-isatopplan VieWoi'Figure' 11;

Figure "3 is a transverse vertieal sectional view' tool carriers 'Referrlngnowtothedrawings'inLdetafl; wherein forfithe purpose of illustration-"ther gi disclosed. apreferred".embo'diment-ofthe presentfinvention;

the numeral HI'representsthetoolihol'der 'orIatheattachment generally"comprisingiabase or anc'hor member 1'2 --that is 'pivotally mounted by fastening member Moi a lat'he machine 'b'ed (notshown) or any other similar "typeotzmahine.

Base member 2 ls=provided1with amut ant pertion having longitudinal channels or grooves "[8 and Ell formed in itsresp'ec'tive lower"face:22 and upperface' ii.

A substantially rectangular carrier 26"is pro videdwith longitudinar ribs or projections 30 and 32at its lower face and upper'face respectively that engage channels l 8 and-2 D.

Incli'ne'cltoo l receiving bores or apertures 34 are provided in the carrier 2 6 at each end'thereo'f and engage the shank portions of tool 36 adjustable in the aperturesby "fasteningmembers 38.

The: carrier 2$"is provided with a centralvsubstantially'rectangular out out portion Ill divided into two-equal chambers 4'2 "by arem'ovable stop -mem'ber- 44 having a reduced inner' portion 46 that frictionally engages: an aperture 48 centrally disposed in the inner face 49 o'f'the base. member'l 2.

Coil springs or the like 50 'are'rfrictionally're taine'd 'ineach o'fthe chambers Mandate biased between the 'stopmember 44 "and the opposing vertical side faces-of the chambers.

The upper forward portion 52 of the member l2 i's 'cover'e'd by a lid or "top platetfid that is remova'hly secured to said portion-52 by fasten ing means5'6.- Both the upper plate '5l and-upper portion 52 are provided'iwith a central cut out portion "58, in "which ismounted ."a "locking pin 621 having a rib 62 formed at its lower face, that bears on the rib 32 atthe upper face of the carrier;

Aniarcu'ateispring arm "54'IiSiSBCl1ITBd at its center i130 "pin and :its ends t-normall-y :bear' againstthe inner-facenof the plate, for urgingz th'er I rib 62 :ofiithetlockingpin 60 against rib 32.

Extending transversely through the upper portion 52 at each end thereof, and at right angles to .rib 3-2, are apertures \66 in which arenslid'ably mounted-preferably rectan'gular actuating bars Stand 10 each having aasubstantially .V-shaped.

- screw-84-carried by ,the' lipper rpla'teleosel y en gag-es an annular recess -85 provided in the boss.

The foregoinglconstruction, permits the rotation of boss 82 relative to the :upperplate 5.4 however, the boss will not become disengaged therefrom 5e cluringiitsrrotary nmvement.v

In practical use of the device, the base member I2 is mounted on the bed of a lathe machine or the like so that by pivoting the base member the tool 36 will be at right angles to the work carried by the machine.

The actuating bars 68 and 10 are mounted in the upper portion 52 so that one end of one of the bars, for example 68, projects outwardly from one side of the upper portion and the outer end of the other bar 16 projects outwardly from the opposite side of the upper portion. Spring arms 88 and 90 carried by the opposite side of the upper portion 80 aid in retaining the bars in the aforestated position.

When the hand gripping bar 92 at the upper end of lever 18 is pulled away from the work carried by the lathe, the carrier 26 is pushed forwardly relative to the base and the rib B2 of locking pin 60 engages a notch or pin recess 94 provided in rib 32, holding the carrier in an advanced position.

The carrier and base member then travel longitudinally against the work with the longitudinallv movable portion of the lathe bed and u on reaching the desired point whereby it is des red to disengage the tool 36 from the work. the forwardly disposed actuating bar, for example 68, will engage an adiustable sto (not shown) provided on the lathe at a selected point which will extend the outer end of bar 68 into the upper port on 52. whereby the lever bar 14 will disen age the no ch in bar 68. rocking the lever bar M so that the rib 62 of the locking pin 68 disengages notch M and the spring 50 w ll return the carrier to its normal posit on relative to the base.

Obviously, if desired. the base member may be pivoted in a complete circle so that the tool at the other end of the carrier may engage the work with rib 62 of locking pin Ml en aging the notch or pin recess 96 in rib 32. The outer end of actuating bar l will then be the element engaging the stop to return the carrier to its normal position relative to the base member.

In view of the foregoing descr ption taken in con unction with the accompanying drawings it is believed that a clear understandin of the device will be quite apparent to those skilled in th s art. A more detailed description is accordingly deemed unnecessary.

'It is to be understood. however, that even though there is herein shown and described a preferred embodiment of the invention the same is susceptible to certain changes fully comprehended by the spirit of the invention as herein described and the scope of the appended claims.

Having described the invention, what is claimed as new is:

1. A lathe attachment comprising a base member, a tool carrier slidably mounted on said base member for longitudinal movement, a support carried by said base member, means carried by said support and connected to said carrier for moving the latter, said support including a housing, a rockable lever disposed in said housing, a locking member carried by said lever and including a rib, said carrier having a plurality of longitudinal spaced recesses for receiving said rib to retain the carrier in an outwardly adjusted position relative to said base member, means carried by said locking member normally urging, the rib into locking engagement with said car rier, a slidable actuating member engageable with a stop to rock said lever for disengaging said rib from a selected one of said recesses, and

resilient means normally urging said carrier to its normal position relative to said base member.

2. The combination of claim 1 wherein said means carried by said locking member normally urging the rib into locking engagement with said carrier includes an arcuate spring member, said housing including an upper wall spaced parallel to said carrier, the end portions of said arcuate spring member bearing against the upper Wall of said housing to urge the locking member toward said carrier.

3. The combination of claim 1 wherein said actuating member includes a bar slidably carried by said carriage and movable perpendicular to the longitudinal axis of said lever.

4. The combination of claim 1 wherein said actuating member includes an elongated bar slidably carried by said carrier and having a notch 'for receiving one end of said lever, the end of said'leverizreceived in said notch including a sloping surface, said notch including an inclined surface bearing against the sloping surfaceof said lever to force the lever out of engagement with said notch during sliding movement of saidv bar in one direction.

5. A lathe attachment comprising a base memher, a tool carrierslidably mounted on said base member for longitudinal movement, a support carried by said base member, means carried by said support and connected to said carrier for moving the lat er. said support including a housing, a rockable lever disposed in said housing, a locking member carried by said lever and including a rib, said carrier having a plurality of longitudinal spaced recesses for receiving said rib to retain the carrier in an outwardly adjusted position relative to said base member, means carried by said locking member normally urging the rib into locking engagement with said carrier, a wedge member slidable on said carrier for rocking said lever to disengage said rib from a selected one of said recesses, and resilient means normally urging said carrier to its normal position relative to said base member. 6. A lathe attachment comprising a base member. a tool carrier slidably mounted on said base member for longitudinal movement, a support carried by said base member, means carried by,

said sup ort and connected to said carrier for moving the latter, said support including a housing. a rockable lever d sposed in said housing, a locking member carried by said lever and including a rib, said carrierhaving a plurality of longitudinal spaced recesses for receiving said rib to,

ing member including a cam receiving said lever,

and means .urging said carrier to its normal position relative to said base member.

'7. The combination ofclaim 6 wherein said last mentioned means includes a bearing plate carried by said support, a slot provided in saidcarrier slidably receiving said bearing plate, said slot including a vertical wall spaced from said bearing plate, and a resilient member received in I said slot and biased between the vertical wall of said slot and said bearing plate.

outwardly of said housing.

9. The combinationof claim 8 wherein said.

5 6 means includes a, spring member having one end UNITED STATES PATENTS fixed to said housing the free end of said last Number Name Date m ntl g ed spg me a m agalnsb sald 1,199,479 Martin Sept 26; 1918 9 mg me 2,379,370 Metz June 26, 1945 ROBERT O. PEARCE. 5

2,396,631 Andresen Mar. 19, 1946 ROBERT KRAMER' 2,409,464 Andresen 001;. 15, 1946 REFERENCES CITED FOREIGN PATENTS The foilowing references are of record in the 10 Numb Country Date me Of this patent: 80,426 Switzerland M251. 1, 1919 

